Chimney-support for oil-lamps.



Li L BRAGG. cmmmsv suaaom roe on LAMPS.

APPLICATIQR FILED 02c.- 19. ma.

l ,97-,%,' Patented -Mar.v18,1919;

Laliz'e Bragg.

JNVEN'I'OR ATTORNEY.

OFFICE.

LALLIE TAI'I BRAGG, OF CAMDEN, ALABAMA.

CHIMNEY-SUPPORT FOR OIL-LAMPS,

Specification of Letters Patent- Patented Mail- 18, 1919.

Application filed December 19, 1918. Serial N 0. 267,420.

To all whom it may concern:

Be it known that I, LALLIE TAIT BRAGG, a. citizen ofthe United States,residing at Camden, in the county of Wilcox and State of Alabama, haveinvented Chimney-Supports for Oil-Lamps, of which the following is afull and complete specification.

My invention is an improvement in 011- lamps, and has special referenceto the provision of means for more securely holding the chimney inconnection with the burner. In the ordinary construction of theconventional oil-lamp the outer edge of the burner device is providedwith several spring fingers which grip the lower port-ion of the chimneyfor holding it in place on said burner, and unless these fingers embracethe .chimney firmly it is likely-to be jolted oil in handling the lamp.Inasmuch as the chimney must be removed in order to light the burner itis required that the means of' connection should be such as to permitits removal and replacement to be accomplished very readily andconveniently, and although the gomlnon gripping fingers fulfil thisrequirement the frequent manipulation ofthe chimney tends to displace orspread them so that they usually fail to properly rip the chimney andhold-it from falling 0 It is the purpose of my invention in the presentinstance to provide the burner device with a marginal annular flangehaving threads and a. shoulder which cooperate with correspondingthreads on the lower portlon of the lamp-chimney to permit the lathg.

to 'be More securely connected to said burne the construction being suchthat the chimney may be readily applied by giving it a halfturn and thethreads on the chimney Wlll engage the shoulder in the flange of theburner to securely hold said chimney from working loose or tilting.

In the following specificatiohs I have fullydcscribed the constructionand operation of" the novel means of connection, and what I particularlyclaim as new, and desire to protect by Letters-Patent is morespecifically set forth in the appended claims. i In the drawings:.LFigure 1 is an elevation illustrating the application of my invention.

il ig. 2 is a sectional view' through the lal up-chimney and cooperatingparts of the burner device.

l jl g. 3 is an elevation of the chimney and burner, separated, theburner being partly in section.

Fig. 4 is a plan View of the burner device, showing the disposition ofthe threads.

Like letters and numerals of reference indicate like parts in theseveral views.

In illustrating the application of my invention I have shown bowl orfont, as A, a conventional type of Wick-burner B, and a chimney C ofordinary shape, and as my invention pertains to cer tain attachments oradditions to the chimney and burner the general form of the lamp partsa'bove referred to may be changed, as will be understood.

In the present instance the annular plate 5 surrounding the body of theburner is provided with an upwardly projecting marginal flange 6 havinginternal threads or spiral grooves 7 extending substantially halfwayaround at opposite sides of said flange and opening out at the upperedge thereof, the lower ends of the threads or spiral groovesterminating a distance above the plate 5 to leave an intermediate wall 8between said plate and aforesaid threads. The inner surface of this wallis on a vertical plane with the base of the threads or grooves 7,whereby there is formed a shoulder 9 through which the lower ends of thespiral grooves open out, as will be understood. Of course thisparticular form of flange maybe easily stamped or otherwise shaped fromthe metal from which the body portion 10 of the lamp chimney C is pro-'vided at opposite sides with threads or spiral ribs 11, 11,corresponding in size and pitch with the threads or spiral grooves 7 inthe flange on the burner and preferably starting a short distance abovethe lower edge of the chimney so that the extreme lower portion of thelatten nay serve as a uide by entering the annular flange of Te burnerin advance of the engagement of the threads. The cylindrical portion ofthe chimney is also extended above the threads or ribs 10 so that thelatter may pass beyond the spiral grooves 7 and engage the shoulder 9,he aforesaid cylindria common form of part of the the usual spring 7 milar pl ate cal portion of the chimney being then embraced by or fittingwithin the threaded portion of the flange of the burner and the chimneyseated upon the annular plate 5, as clearly shown in Fi 2 of thedrawings.

In attaching the chimney to my improvet retaining-flange on the burnerthe lower end of the chimney is inserted in the upper or threadedportion. of the flange and said chimney is then turned to thread thespiral ribs through the corresponding grooves so that the chimney willseat on the annular plate and be securely and firmly held by engagementwith the shoulders and threaded portion of said retaining-flange. Aswill be noted the operation. may plished, and in this instance thechimney is not only securely connected to the burner but is alsoprevented from accidentally working loose or falling off. The chimneycan be removed as quickly by simply lifting and turning it so as tothread the ribs out of the upper or threaded portionof the retaining-tiange. As heretofore stated, the chimney retaining-flange will be formedas an integral body portion of the burner by during the operation ofstampbody portion from sheet metal,

shaping it QandtherefOre the complete burner can be 3 produced at lessexpense than one having fingers that have to be applied by a separateoperation.

, I claim:

1..A burner for oil-lamps having an anand an upwardly projectingmarginal flange with threads at the upper portion thereof terminating adistance above the plate, in combination with a ehnnney havingcorresponding threads at its lower end and a cylindrical portion abovethe threads on a vertical plane with the base of said threads. the widthofthe threaded portion of the chimney corresponding approximatelywitlrthe width of the space between the annular plate and threadedportion of the burner to fit within said space, substan tially as shownand for the purpose set forth.

2. A burner for oil-lamps having an an nular plate and an upwardly-projecting marginal flange with threads at the upper portion thereofand a shoulder at the lower be readily accomof the grooves 'ingapproximately with end of the threads through which the latter extend.said shoulder being located a distance above the annular plate of theburner; in combination with a chimney having corresponding threads atits lower end and a cylindrical portion above the threads on a verticalplane with the base of said threads,

the width of the threaded portion of the chimney correspondingapproximately with the width of the space between. the annular plate andshoulder on the burner to occupy said space, substantially as shown andfor the purpose set forth.

3. A burner for oil-lamps-having an annular plate and an upwiurdlyprojecting marginal flange with spiral grooves at its upper portionextending substantially half way around the flange atopposite sidesthereof and shoulders between the lower ends and at a distance above theannular plate; in combination with a chimney having at its lower endribs corresponding with the aforesaid grooves and a cylindrical portionabove the ribs on a plane with the base thereof, the width of the ribbedportion of the chimney corresponding approximately with the width of thespace between the aforesaid shoulders and annular plate of the burner,substantially as shown and for the purpose set forth.

4. A burner for oil-lamps having an annular plate and an upwardlyprojecting marginal flange with spiral grooves at its upper portionextending substantially half way around the flange at opposite sidesthereof and shoulders between the lower ends of the grooves at adistance above the annular plate; in combination with a chimney having acylindrical portion at its lower end and spiral ribs on said cylindricalportion corresponding with the spiral gro ves in the flange of t eburner. said ribs being located a short distance above the lower end oftlfi. chimney to provide a guiding portion below the ribs. the width ofthe ribbed portion of the chimney correspondthe width of the spacebetween the aforesaid shoulders and annular plate of the burner,substantially as shown and described.

LALLIE TAIT BRAGG,

